Fuel nozzles for large flow range



K. W. JAY

FUEL NOZZLES FOR LARGE FLOW RANGE Filed April 4, 1958 Jan. 31, 1961 FIG. 1

FIG. 2

INVENTOR K. W- JAY ATTORNEYS States 2,969,924 FUEL NOZZLES FOR LARGE FLOW RANGE Kenneth William Jay, North York Township, Canada, assignor to Orenda Engines Limited, Ontario, Canada, a corporation Filed Apr. 4, 1958, Ser. No. 726,396 2 Claims. (Cl. 239-436) Ontario, Malton,

sary in order to withstand the high pressures.

- Situations requiring a large flow range are very frequently encountered in aircraft gas turbine engines where,

require an excessively large flow of fuel.

It is an object of the present invention fluid delivery nozzle which is adapted for delivering fuel advantages of extremely hand, and extremely low pump pressures, on the other hand.

The invention is described with reference to the accompanying drawings which illustrate a preferred embodiment of the invention in which like reference numerals denote like parts in the various views and in which:

Figure 1 is an axial section of a fluid nozzle constructed in accordance with the present invention, and

Figure 2 is a view similar to Figure 1 showing the internal parts in a different position.

Referring now to Figure 1 the nozzle will be seen to comprise a barrel which is cylindrical in cross-section separate from the side suitable means such as At the other end of interior of the side wall The piston 19 is provided with a hollow axial extension- 23 which terminates, at the end adjacent the first orifice 12 in a second orific 24 which is coaxial with the first orifice 12.

In operation fluid enters the conduit 18 in the direction of the arrow 25 and experienced two pressure drops during its passage from the line 18 through the orifice 12.

As a result, the

value which will prevent vaporization and which will ensure an even distribution of fluid throughout the system in the event that several of these nozzles are employed in parallel.

As the pressure in line 18 is increased due to a demand for an increased flow from the nozzle, the piston 19 will be urged towards the first orifice 12 against the spring 20 containing the first orifice 12. The invention has been described with reference to a that minor modifications may be made within the spirit of the invention as defined by the appended claims.

What I claim as my invention is:

l. A fluid delivery nozzle comprising a hollow barrel closed as it does so, a first pressure drop and thence flows from the hollow barrel through the first orifice in the end plate experiencing as it does so, a second pressure drop; to a which the barrel is cylindrical and the first and second.

second position in which the second orifice lies within the orifices are co-axial with one another and with the barrel.

from said barrel and fluid flowing from the conduit flows Ref re ces C ed in the file of this patent into the barrel on that side of the piston remote from the 5 UNITED STATES PATENTS end plate and thence flows only through the hollow piston, extension and second orifice experiencing as it does 2,680,043 Campbell June 1954 2,703,195 Froidevaux Mar. 1, 1955 so, only a single pressure drop.

2. A fluid delivery nozzle as claimed in claim 1 in 9 Goyette et a1. Aug. 20, 1957 

